History: 40 year old male with history of gout presents with chronic knee pain for 5 months.

Findings: There is no evidence of bone marrow abnormality. A small joint
effusion is present. A large nodular mass is seen adjacent to the lateral superior patella with isointense signal on T1 and heterogeneous signal on T2 measuring approximately 5.2 x 1.8 x 6 cm. Smaller similar masses are present at the femoropopliteal insertion site, within the femoral notch and at the base of the Hoffa's fat pad just anterior to the anteromedial tibia.
The PCL appears thickened but intact. The ACL, menisci, and collateral
ligament complexes are unremarkable. Full thickness fissuring is present in the medial trochlea cartilage.

History: 40 year old male with history of gout presents with chronic knee pain for 5 months.

Findings: There is no evidence of bone marrow abnormality. A small joint
effusion is present. A large nodular mass is seen adjacent to the lateral superior patella with isointense signal on T1 and heterogeneous signal on T2 measuring approximately 5.2 x 1.8 x 6 cm. Smaller similar masses are present at the femoropopliteal insertion site, within the femoral notch and at the base of the Hoffa's fat pad just anterior to the anteromedial tibia.
The PCL appears thickened but intact. The ACL, menisci, and collateral
ligament complexes are unremarkable. Full thickness fissuring is present in the medial trochlea cartilage.